US6594243B1 - Methods and apparatus for enhanced soft handoff in a CDMA wireless communication system - Google Patents
Methods and apparatus for enhanced soft handoff in a CDMA wireless communication system Download PDFInfo
- Publication number
- US6594243B1 US6594243B1 US09/354,220 US35422099A US6594243B1 US 6594243 B1 US6594243 B1 US 6594243B1 US 35422099 A US35422099 A US 35422099A US 6594243 B1 US6594243 B1 US 6594243B1
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- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000004891 communication Methods 0.000 title claims abstract description 30
- 230000001413 cellular effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0094—Definition of hand-off measurement parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/12—Reselecting a serving backbone network switching or routing node
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims (22)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/354,220 US6594243B1 (en) | 1999-07-15 | 1999-07-15 | Methods and apparatus for enhanced soft handoff in a CDMA wireless communication system |
CA002313253A CA2313253A1 (en) | 1999-07-15 | 2000-06-29 | Methods and apparatus for enhanced soft handoff in a cdma wireless communication system |
EP00305607A EP1069797B1 (en) | 1999-07-15 | 2000-07-03 | Method and apparatus for enhanced soft handoff in a CDMA wireless communication system |
DE60026457T DE60026457T2 (en) | 1999-07-15 | 2000-07-03 | Method and apparatus for improved soft handover in a CDMA cordless transmission system |
KR1020000040163A KR20010021075A (en) | 1999-07-15 | 2000-07-13 | Methods and apparatus for enhanced soft handoff in a CDMA wireless communication system |
CN00120259A CN1281301A (en) | 1999-07-15 | 2000-07-14 | Method and device of enhanced soft cross region change over in code division multiple access radio communication |
JP2000213584A JP3681619B2 (en) | 1999-07-15 | 2000-07-14 | Method and apparatus for improving soft handoff in a CDMA wireless communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/354,220 US6594243B1 (en) | 1999-07-15 | 1999-07-15 | Methods and apparatus for enhanced soft handoff in a CDMA wireless communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
US6594243B1 true US6594243B1 (en) | 2003-07-15 |
Family
ID=23392363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/354,220 Expired - Fee Related US6594243B1 (en) | 1999-07-15 | 1999-07-15 | Methods and apparatus for enhanced soft handoff in a CDMA wireless communication system |
Country Status (7)
Country | Link |
---|---|
US (1) | US6594243B1 (en) |
EP (1) | EP1069797B1 (en) |
JP (1) | JP3681619B2 (en) |
KR (1) | KR20010021075A (en) |
CN (1) | CN1281301A (en) |
CA (1) | CA2313253A1 (en) |
DE (1) | DE60026457T2 (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020075827A1 (en) * | 2000-12-19 | 2002-06-20 | Balogh Dan Anthony | Data transmission in a wireless communication system |
US20030060201A1 (en) * | 2001-09-25 | 2003-03-27 | Soliman Samir S. | Method and system for optimizing system-access and soft-handoff parameters based on location information |
US20040029532A1 (en) * | 2002-04-29 | 2004-02-12 | Uwe Schwarz | Method and apparatus for soft handover area detection for uplink interference avoidance |
US6782261B1 (en) * | 2000-04-27 | 2004-08-24 | Lucent Technologies Inc. | Wireless handoff management method and device |
US20040224691A1 (en) * | 2003-05-09 | 2004-11-11 | Zion Hadad | Handoff system and method |
US20050176385A1 (en) * | 2004-02-05 | 2005-08-11 | Interdigital Technology Corporation | Method for performing measurements for handoff of a mobile unit operating with a switched beam antenna in a wireless communication system, and corresponding system |
US20050181733A1 (en) * | 2004-02-06 | 2005-08-18 | Interdigital Technology Corporation | Method and apparatus for measuring channel quality using a smart antenna in a wireless transmit/receive unit |
US20050215201A1 (en) * | 2004-03-25 | 2005-09-29 | Qiang Cao | Radio telecommunications network, and a method of selecting base station antennas for connection with a mobile user terminal |
US20050215254A1 (en) * | 2002-06-05 | 2005-09-29 | Pedersen Klaus I | Method of performing handdover by using different handover parameters for different traffic and user classes in a communication network |
US6973308B1 (en) | 2001-11-27 | 2005-12-06 | Cisco Technology, Inc. | Communication system with floating call anchor |
US6980808B1 (en) | 2001-11-27 | 2005-12-27 | Cisco Technology, Inc. | Communication system with floating physical channel |
US20050288018A1 (en) * | 2004-06-29 | 2005-12-29 | Huang Ching Y | Multi-slope handoff algorithm for controlling dynamic communication quality in wireless communications |
WO2007053554A1 (en) * | 2005-10-27 | 2007-05-10 | Qualcomm Incorporated | Active set maintenance by an access network in a wireless communication system |
US20070123262A1 (en) * | 2002-03-08 | 2007-05-31 | Proctor James A Jr | Antenna adaptation to manage the active set to manipulate soft hand-off regions |
WO2008069483A1 (en) * | 2006-12-07 | 2008-06-12 | Electronics And Telecommunications Research Intitute | Active set threshold adjustment method for use in wireless internet system |
CN100403841C (en) * | 2004-05-28 | 2008-07-16 | 华为技术有限公司 | Method for regulating user equipment active set dynamically |
US20090191879A1 (en) * | 2008-01-21 | 2009-07-30 | Hitachi Communication Technologies, Ltd. | Wireless communication system and soft handoff control method in wireless communication system |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL159361A0 (en) | 2001-06-26 | 2004-06-01 | Qualcomm Inc | Method and apparatus for adaptive server selection in a data communication system |
US6731936B2 (en) | 2001-08-20 | 2004-05-04 | Qualcomm Incorporated | Method and system for a handoff in a broadcast communication system |
US6980820B2 (en) | 2001-08-20 | 2005-12-27 | Qualcomm Inc. | Method and system for signaling in broadcast communication system |
CN1493125A (en) * | 2001-10-19 | 2004-04-28 | Method for handover in synchronous CDMA | |
KR100433898B1 (en) * | 2002-01-14 | 2004-06-04 | 삼성전자주식회사 | Apparatus and method for determining soft hand-over in cdma mobile communication system |
ES2364869T3 (en) * | 2003-08-05 | 2011-09-15 | Qualcomm Incorporated | EXTENDED CHANNEL OF CONFIRMATION OF RECEPTION AND CONTROL OF TRANSMISSION RATE. |
US7126928B2 (en) * | 2003-08-05 | 2006-10-24 | Qualcomm Incorporated | Grant, acknowledgement, and rate control active sets |
US7912485B2 (en) | 2003-09-11 | 2011-03-22 | Qualcomm Incorporated | Method and system for signaling in broadcast communication system |
CN100344167C (en) * | 2003-09-30 | 2007-10-17 | 华为技术有限公司 | Automatic optimization method for neighbouring relation |
US8570880B2 (en) | 2004-08-05 | 2013-10-29 | Qualcomm Incorporated | Method and apparatus for receiving broadcast in a wireless multiple-access communications system |
US20110124361A1 (en) * | 2008-05-27 | 2011-05-26 | Ntt Docomo, Inc. | Method of accommodating radio base stations and network apparatus |
US10588037B2 (en) | 2014-07-09 | 2020-03-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Method, wireless communication device and computer program for maintaining a set of monitored carriers |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5267261A (en) | 1992-03-05 | 1993-11-30 | Qualcomm Incorporated | Mobile station assisted soft handoff in a CDMA cellular communications system |
WO1999004593A1 (en) | 1997-07-21 | 1999-01-28 | Qualcomm Incorporated | A method of and apparatus for selecting base stations to communicate with a remote station |
US5898682A (en) | 1996-03-11 | 1999-04-27 | Nec Corporation | Radio channel control apparatus used in a CDMA cellular system and capable of changing cell size |
US6151502A (en) * | 1997-01-29 | 2000-11-21 | Qualcomm Incorporated | Method and apparatus for performing soft hand-off in a wireless communication system |
US6233455B1 (en) * | 1999-05-03 | 2001-05-15 | Nortel Networks Limited | Method for utilizing negative T—COMP to improve handoff reliability |
US6337984B1 (en) * | 1998-11-04 | 2002-01-08 | Lg Information & Communications, Ltd. | Method for controlling a handoff in a communication system |
US6353602B1 (en) * | 1998-08-07 | 2002-03-05 | Lucent Technologies Inc. | CDMA base station assisted soft handoff |
US6381458B1 (en) * | 1998-05-15 | 2002-04-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and system for soft handoff control based on access network capacity |
-
1999
- 1999-07-15 US US09/354,220 patent/US6594243B1/en not_active Expired - Fee Related
-
2000
- 2000-06-29 CA CA002313253A patent/CA2313253A1/en not_active Abandoned
- 2000-07-03 DE DE60026457T patent/DE60026457T2/en not_active Expired - Lifetime
- 2000-07-03 EP EP00305607A patent/EP1069797B1/en not_active Expired - Lifetime
- 2000-07-13 KR KR1020000040163A patent/KR20010021075A/en not_active Application Discontinuation
- 2000-07-14 CN CN00120259A patent/CN1281301A/en active Pending
- 2000-07-14 JP JP2000213584A patent/JP3681619B2/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5267261A (en) | 1992-03-05 | 1993-11-30 | Qualcomm Incorporated | Mobile station assisted soft handoff in a CDMA cellular communications system |
US5898682A (en) | 1996-03-11 | 1999-04-27 | Nec Corporation | Radio channel control apparatus used in a CDMA cellular system and capable of changing cell size |
US6151502A (en) * | 1997-01-29 | 2000-11-21 | Qualcomm Incorporated | Method and apparatus for performing soft hand-off in a wireless communication system |
WO1999004593A1 (en) | 1997-07-21 | 1999-01-28 | Qualcomm Incorporated | A method of and apparatus for selecting base stations to communicate with a remote station |
US6381458B1 (en) * | 1998-05-15 | 2002-04-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and system for soft handoff control based on access network capacity |
US6353602B1 (en) * | 1998-08-07 | 2002-03-05 | Lucent Technologies Inc. | CDMA base station assisted soft handoff |
US6337984B1 (en) * | 1998-11-04 | 2002-01-08 | Lg Information & Communications, Ltd. | Method for controlling a handoff in a communication system |
US6233455B1 (en) * | 1999-05-03 | 2001-05-15 | Nortel Networks Limited | Method for utilizing negative T—COMP to improve handoff reliability |
Non-Patent Citations (1)
Title |
---|
ANSI/TIA/EIA-95-B, "Mobile Station-Base Station Compatibility Standard for Dual-Mode Spread Spectrum Systems," pp. 6-347 to 6-417, pp. 7-168 to 7-175 and pp. 7-206 to 7-212, Oct. 31, 1998. |
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6782261B1 (en) * | 2000-04-27 | 2004-08-24 | Lucent Technologies Inc. | Wireless handoff management method and device |
US6842441B2 (en) * | 2000-12-19 | 2005-01-11 | Lucent Technologies Inc. | Data transmission in a wireless communication system |
US20020075827A1 (en) * | 2000-12-19 | 2002-06-20 | Balogh Dan Anthony | Data transmission in a wireless communication system |
US20030060201A1 (en) * | 2001-09-25 | 2003-03-27 | Soliman Samir S. | Method and system for optimizing system-access and soft-handoff parameters based on location information |
US7680497B2 (en) * | 2001-09-25 | 2010-03-16 | Qualcomm Incorporated | Method and system for optimizing system-access and soft-handoff parameters based on location information |
US6973308B1 (en) | 2001-11-27 | 2005-12-06 | Cisco Technology, Inc. | Communication system with floating call anchor |
US6980808B1 (en) | 2001-11-27 | 2005-12-27 | Cisco Technology, Inc. | Communication system with floating physical channel |
US8406763B1 (en) | 2001-11-27 | 2013-03-26 | Cisco Technology, Inc. | Communication system with floating call anchor |
US20070123262A1 (en) * | 2002-03-08 | 2007-05-31 | Proctor James A Jr | Antenna adaptation to manage the active set to manipulate soft hand-off regions |
US8265630B2 (en) * | 2002-03-08 | 2012-09-11 | Ipr Licensing Inc. | Antenna adaptation to manage the active set to manipulate soft hand-off regions |
US7424296B2 (en) * | 2002-04-29 | 2008-09-09 | Nokia Corporation | Method and apparatus for soft handover area detection for uplink interference avoidance |
US20040029532A1 (en) * | 2002-04-29 | 2004-02-12 | Uwe Schwarz | Method and apparatus for soft handover area detection for uplink interference avoidance |
US20050215254A1 (en) * | 2002-06-05 | 2005-09-29 | Pedersen Klaus I | Method of performing handdover by using different handover parameters for different traffic and user classes in a communication network |
US20040224691A1 (en) * | 2003-05-09 | 2004-11-11 | Zion Hadad | Handoff system and method |
WO2005076970A3 (en) * | 2004-02-05 | 2006-11-02 | Interdigital Tech Corp | Method for performing measurements for handoff of a mobile unit operating with a switched beam antenna |
US20050176385A1 (en) * | 2004-02-05 | 2005-08-11 | Interdigital Technology Corporation | Method for performing measurements for handoff of a mobile unit operating with a switched beam antenna in a wireless communication system, and corresponding system |
US7764957B2 (en) | 2004-02-05 | 2010-07-27 | Interdigital Technology Corporation | Method for performing measurements for handoff of a mobile unit operating with a switched beam antenna in a wireless communication system, and corresponding system |
US20070202921A1 (en) * | 2004-02-05 | 2007-08-30 | Interdigital Technology Corporation | Method for performing measurements for handoff of a mobile unit operating with a switched beam antenna in a wireless communication system, and corresponding system |
US7295811B2 (en) * | 2004-02-05 | 2007-11-13 | Interdigital Technology Corporation | Method for performing measurements for handoff of a mobile unit operating with a switched beam antenna in a wireless communication system, and corresponding system |
US8320919B2 (en) | 2004-02-06 | 2012-11-27 | Interdigital Technology Corporation | Method and apparatus for measuring channel quality using a smart antenna in a wireless transmit/receive unit |
US7274936B2 (en) * | 2004-02-06 | 2007-09-25 | Interdigital Technology Corporation | Method and apparatus for measuring channel quality using a smart antenna in a wireless transmit/receive unit |
US20080020715A1 (en) * | 2004-02-06 | 2008-01-24 | Interdigital Technology Corporation | Method and apparatus for measuring channel quality using a smart antenna in a wireless transmit/receive unit |
US20050181733A1 (en) * | 2004-02-06 | 2005-08-18 | Interdigital Technology Corporation | Method and apparatus for measuring channel quality using a smart antenna in a wireless transmit/receive unit |
US20050215201A1 (en) * | 2004-03-25 | 2005-09-29 | Qiang Cao | Radio telecommunications network, and a method of selecting base station antennas for connection with a mobile user terminal |
US7277707B2 (en) * | 2004-03-25 | 2007-10-02 | Lucent Technologies Inc. | Radio telecommunications network, and a method of selecting base station antennas for connection with a mobile user terminal |
CN100403841C (en) * | 2004-05-28 | 2008-07-16 | 华为技术有限公司 | Method for regulating user equipment active set dynamically |
US7242936B2 (en) * | 2004-06-29 | 2007-07-10 | National Chiao Tung University | Multi-slope handoff algorithm for controlling dynamic communication quality in wireless communications |
US20050288018A1 (en) * | 2004-06-29 | 2005-12-29 | Huang Ching Y | Multi-slope handoff algorithm for controlling dynamic communication quality in wireless communications |
WO2007053554A1 (en) * | 2005-10-27 | 2007-05-10 | Qualcomm Incorporated | Active set maintenance by an access network in a wireless communication system |
WO2008069483A1 (en) * | 2006-12-07 | 2008-06-12 | Electronics And Telecommunications Research Intitute | Active set threshold adjustment method for use in wireless internet system |
US20090191879A1 (en) * | 2008-01-21 | 2009-07-30 | Hitachi Communication Technologies, Ltd. | Wireless communication system and soft handoff control method in wireless communication system |
US8175606B2 (en) * | 2008-01-21 | 2012-05-08 | Hitachi, Ltd. | Wireless communication system and soft handoff control method in wireless communication system |
Also Published As
Publication number | Publication date |
---|---|
CA2313253A1 (en) | 2001-01-15 |
EP1069797B1 (en) | 2006-03-08 |
KR20010021075A (en) | 2001-03-15 |
JP3681619B2 (en) | 2005-08-10 |
EP1069797A2 (en) | 2001-01-17 |
JP2001069549A (en) | 2001-03-16 |
DE60026457T2 (en) | 2006-09-14 |
CN1281301A (en) | 2001-01-24 |
DE60026457D1 (en) | 2006-05-04 |
EP1069797A3 (en) | 2001-12-12 |
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AS | Assignment |
Owner name: LUCENT TECHNOLOGIES INC., NEW JERSEY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HUANG, CHING YAO;HUANG, JOE;WU, I-FONG ANTONIO;AND OTHERS;REEL/FRAME:010268/0233 Effective date: 19990728 |
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Owner name: CREDIT SUISSE AG, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:ALCATEL-LUCENT USA INC.;REEL/FRAME:030510/0627 Effective date: 20130130 |
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Owner name: ALCATEL-LUCENT USA INC., NEW JERSEY Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG;REEL/FRAME:033950/0001 Effective date: 20140819 |
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STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
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FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20150715 |